New spectroscopic observations of the B[e]/K binary system MWC 623 [PDF]
, 2001 The B[e]/K binary system MWC 623 was reinvestigated using new spectroscopic observations. The absorption lines of the K and the B star do not exhibit any significant radial velocity variations over a time interval of 14 years. The spectral classification
Allen +19 more
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The Wind Velocities Driven by Alfven Waves in 31 CYG [PDF]
Journal of Astronomy and Space Sciences, 1991 31 Cyg is a ζ Aur-type eclipsing long-period binary composed a K supergiant and a hot main sequence star. Superginats have massive cool winds with low terminal velocities, and it is generally believed that supergiant's winds are driven by Alfven waves ...
Kyung-Mee Kim, Kyu-Hong Choi
doaj
The secondary star and distance of the polar V1309 Ori [PDF]
, 2006 The first phase-resolved JHK light curves of the eclipsing polar (AM Herculis binary) V1309 Ori are presented and interpreted. We separate the contributions from the secondary star and from other sources with the aim of determining a photometric distance.
Bailey +26 more
core +2 more sources
A near-infrared study of the star forming region RCW 34
, 2012 We report the results of a near-infrared imaging study of a $7.8 \times 7.8$ arcmin$^2$ region centered on the 6.7 GHz methanol maser associated with the RCW 34 star forming region using the 1.4m IRSF telescope at Sutherland. A total of 1283 objects were
Czanik, R. J. +2 more
core +1 more source
Sequential star formation in IRAS 06084-0611 (GGD 12-15): From intermediate-mass to high-mass stars [PDF]
, 2011 Context. The formation and early evolution of high- and intermediate-mass stars towards the main sequence involves the interplay of stars in a clustered and highly complex environment.
Bik, A. +7 more
core +3 more sources
Evaluating Gyrochronology on the Zero-Age-Main-Sequence: Rotation Periods in the Southern Open Cluster Blanco 1 from the KELT-South Survey [PDF]
, 2013 We report periods for 33 members of Blanco 1 as measured from KELT-South light curves, the first reported rotation periods for this benchmark zero-age-main-sequence open cluster. The distribution of these stars spans from late-A or early-F dwarfs to mid-K with periods ranging from less than a day to ~8 days.
arxiv +1 more source
Spectral synthesis analysis and radial velocity study of the northern F-, G-, and K-type flare-stars [PDF]
Mon.Not.Roy.Astron.Soc.365:1050,2006, 2005 In this publication we present a study of the general physical, chemical properties and radial velocity monitoring of young active stars. We derive temperatures, log g, [Fe/H], v sin i, and R_{spec} values for eight stars. The detailed analysis reveals that the stars are not as homogeneous in their premier physical parameters as well as in the age ...
arxiv +1 more source
Unveiling wide-orbit companions to K-type stars in Sco-Cen with Gaia EDR3 [PDF]
, 2021 Abbreviated. We aim to identify new low-mass companions to young stars using the astrometric measurements provided by the Gaia space mission and complementary VLT/SPHERE data. We identify companion candidates from a sample of K-type, pre-main sequence stars in the Scorpius Centaurus association using the early version of the third data release of the ...
arxiv +1 more source
Chemical evolution of high-mass stars in close binaries. I. The eclipsing binary V453 Cygni
, 2008 The eclipsing and double-lined spectroscopic binary system V453 Cygni consists of two early B-type stars, one of which is nearing the terminal age main sequence and one which is roughly halfway through its main sequence lifetime. Accurate measurements of
Andersen +72 more
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A probable pre-main sequence chemically peculiar star in the open cluster Stock 16 [PDF]
, 2014 We used the Ultraviolet and Visual Echelle Spectrograph of the ESO-Very Large Telescope to obtain a high resolution and high signal-to-noise ratio spectrum of Stock 16-12, an early-type star which previous Delta-a photometric observations suggest being a
Bagnulo, S. +5 more
core +3 more sources